我想分块解析一个巨大的 json 文件。我想使用它的大块而不加载整个东西。数据可以在这里找到 http://jmcauley.ucsd.edu/data/amazon/
当我使用 ijson 执行此操作时,出现JSONError: Additional data
. 有没有办法做到这一点?
我的代码:##产生附加数据错误
import pandas as pd
file = open('Books_5.json',"r") ##Books_5.json is the 5-core small dataset
objects = ijson.items(file, 'meta.data.item')
reviews = (o for o in objects if o['type']=='reviewText')
for review in reviews : print(review)
这确实有效,但速度很慢:
path='Books_5.json'
def parse(path):
g = open(path, 'rb')
for l in g:
yield eval(l)
def getDF(path):
i = 0
df = {}
for d in parse(path):
df[i] = d
i += 1
return pd.DataFrame.from_dict(df, orient='index')
df = getDF(path)
df.info()